More Axolotl Variants API

Fixed a crash.

Updated to 1.21.

Updated to 1.20.6. Dropped Forge Support.

Updated dependencies.

• Fix #8 (Mixin crash on Forge)

• Fixed axolotl bucket models not loading due to new Fabric API Model Loader changes
• Fix a bug when trying to spawn axolotl variants that don't exists

Pull Request by @LunaWasFlaggedAgain

• Fix bucket not saving and spawning baby axolotls.
• Minor project changes

• Add dynamic Axolotl Bucket textures (KxmischesDomi)
• Add Axolotl Bucket Tooltip (KxmischesDomi)

Updated to 1.20.

Updated to 1.19.4.

Fix a crash on Fabric.

Fixed a crash due to Mojang's variant enum changes.